Lrl from Italy

[mustefa ubram]

franco
Does putting batteries in this way creates pores in the boxes in the works?

In general, the power supply does not need a separate box or differences?

[abdou2014]

Can I put bc548c or BC549c for ( Tr2 - Tr3 - Tr4 - Tr5 ) in place of bc 183c ?

[mustefa ubram]

Originally Posted by abdou2014

Can I put bc548c or BC549c for ( Tr2 - Tr3 - Tr4 - Tr5 ) in place of bc 183c ?

no abdou2014
bc548 &bc549 is low gain transistor but bc183c is hi gain transistor

[dream_man]

Hi dear Mustefa ;
I've seen your Cristal 8 MHz PCB and faced to some questions. What are the components which I mentioned by the red lines in the below picture?.. one of them is L7812 regulator, but I dont know the capacitance of the rest of components.
Thanks for your contribution my friend.

[mustefa ubram]

Originally Posted by dream_man

Hi dear Mustefa ;
I've seen your Cristal 8 MHz PCB and faced to some questions. What are the components which I mentioned by the red lines in the below picture?.. one of them is L7812 regulator, but I dont know the capacitance of the rest of components.
Thanks for your contribution my friend.

hi freind
I hope you have understood correctly mean.I have specified the amount of three capacitors
best wish

[dream_man]

Thank you dear Mustefa for you fast and supportive reply. How about your results?.. have you achieved any good outcome using this 8MHz cristal circuit? ...

[dream_man]

Dear Mustefa, I think you forgot to draw the place of 3 turns filter on the board. Please locate the place of the filter if it is possible.

[pigeon]

Originally Posted by mustefa ubram

hi freind
I hope you have understood correctly mean.I have specified the amount of three capacitors
best wish

hi all friend
how I can fix the antenna and the choke coil

can i use bc237 in place bc183


thank you

[mustefa ubram]

Originally Posted by dream_man

Dear Mustefa, I think you forgot to draw the place of 3 turns filter on the board. Please locate the place of the filter if it is possible.

Dear friend . There is LC circuit board.I have identified.Be careful
I never could I tested the device in action.Because I had no real purpose.

[mustefa ubram]

Originally Posted by pigeon

hi all friend
how I can fix the antenna and the choke coil

can i use bc237 in place bc183


thank you

You can not do not use the choke.Because you need to tune the resonance frequency.


Maybe you're using the bc237. Should be tested in reality.But need to hi gain.Choose high-gain transistor.bc183c Is good.

best wish

[dream_man]

Thank you Mustefa, But real purpose is rare and as Franco said we must test it by at least 2 months buried metals.

[dream_man]

Originally Posted by pigeon

hi all friend
how I can fix the antenna and the choke coil

can i use bc237 in place bc183


thank you

Here I reply you by what Franco recommended earlier ;

"The heart of all the LRL is the high gain part consists of TR2, TR3 and TR4; if the gain is too large this part goes into oscillation and it's very unstable, if instead the gain is too low, the phenomenon is not revealed.I use the type BC183C transistors because I own a lot, but you can use equivalent types (BC109C, BC209C, BC239C and so on) the important thing is that they are NPN silicon with high "beta" (suffix "C"). The RF gain of the amplifier,for a certain range of frequencies, depends on the value of C13 and C14, the lowest value = less amplification and vice versa."

"The best antenna is a stylus 80cm-100cm. With 30cm it has the minimum sensitivity, the greater the length the greater the sensitivity. With these changes, it is possible to detect targets that were previously ignored, such as, for example, short time metals buried (1 month or more) in your test field."

Hope it helps you.

[mustefa ubram]

Originally Posted by dream_man

Thank you Mustefa, But real purpose is rare and as Franco said we must test it by at least 2 months buried metals.

Right Franco

[pigeon]

Originally Posted by mustefa ubram

Dear friend . There is LC circuit board.I have identified.Be careful
I never could I tested the device in action.Because I had no real purpose.

hi mustafa

is what you can give me a picture to facilitate
fixing the choke coil and the antenna

thank you very much

[abdou2014]

Mr Franco You Said That "for a certain range of frequencies, depends on the value of C13 and C14, the lowest value = less amplification and vice versa."
what is the maximum value of C13 C14 (for more gain) in remaining in Range of frequency wish ?

[pigeon]

Originally Posted by dream_man

Here I reply you by what Franco recommended earlier ;

"The heart of all the LRL is the high gain part consists of TR2, TR3 and TR4; if the gain is too large this part goes into oscillation and it's very unstable, if instead the gain is too low, the phenomenon is not revealed.I use the type BC183C transistors because I own a lot, but you can use equivalent types (BC109C, BC209C, BC239C and so on) the important thing is that they are NPN silicon with high "beta" (suffix "C"). The RF gain of the amplifier,for a certain range of frequencies, depends on the value of C13 and C14, the lowest value = less amplification and vice versa."

"The best antenna is a stylus 80cm-100cm. With 30cm it has the minimum sensitivity, the greater the length the greater the sensitivity. With these changes, it is possible to detect targets that were previously ignored, such as, for example, short time metals buried (1 month or more) in your test field."

Hope it helps you.

thank you

[mustefa ubram]

Originally Posted by pigeon

hi mustafa

is what you can give me a picture to facilitate
fixing the choke coil and the antenna

thank you very much

dear freind You can not have a fixed chokes.Because you need to adjust the resonant frequency and the air-core coil.You can test for proposed Franco 3turn coil and The parallel capacitor 22p.This is a fixed amount.
best wish

[pigeon]

Originally Posted by mustefa ubram

dear freind You can not have a fixed chokes.Because you need to adjust the resonant frequency and the air-core coil.You can test for proposed Franco 3turn coil and The parallel capacitor 22p.This is a fixed amount.
best wish

ok thank you

[dream_man]

Hello dear Mustefa;
Your 8MHz crystal circuit has some problems. c8 is not located and R5 is not connected before c8 and c7. May you find more errors on that. I've drawn a circle on the wrong place in the below picture.

[brs]

hi frands
I'm placing
tr1 2n5551
tr2,tr3,tr4 and tr 5 C9014
but high sensitivity to influence the compass and the sky

[dream_man]

Hi there ;
Anyone has a correct and an updated PCB of 8MHz crystal circuit? ... Kindly upload it if you have.

[Hadi]

Originally Posted by enjoykin4

Dear Franco I have not experience in the construction of electronic musical instruments, electronic organs and other electoinic instruments but i have experience in physic's experiments.

If you make some experiments with nano-pulses in HV domain you will see that envelope of nano-pulses have almost perfect sawtooth wave shape - so it have infinite superpositions of both odd and even harmonics over wide frequenc range. If you succedd to make an Unipolar nano-impulse you will get pure potential impulse with zero current running. This kind of impulses are basic of scalar longitudinal waves. So am pretty sure that gold treasure radiate above described zero current - high potential impulses (remember burnt front-end LRL electronics of Alonso Geo and many others LRL hunters). And yes they (nano-impulse) influent E-field of your telescopic antenna and parallel tank-circuit changing amplitude and phase of your LRL. And they deca with 1/r law.

Best Regards from Russia
Enjokin4

Hello dear Enjokin4

I design this program and circuit. In this program, pulse train so you can change frequency and duty cycle and can to change delay of next pulses (OOK modulation).
The pulses are bipolar. Also you can change turns of second wire transformer to make bipolar high voltage.

[pigeon]

hi all friends

i have this projet by persian forum. it is correct

thank you

[pigeon]

hi

[pigeon]

if these projects are okay, help me make one

by persian forum

thank you all